The maya civilization composed of blank that were ruled by a class of blank can someone me plz

Was the battle of iwo jima over after us troops raised the flag on mt. suribachi?

:) during the cold war, people were afraid of communists, both outside and inside the united states. the red scare and mccarthyism that grew out of these fears were damaging to the american way of life. during the mccarthy years, many of the freedoms guaranteed in the bill of rights were limited. write a paragraph explaining what lessons can be learned from the mccarthy era about what u. s. citizens need to protect in order to preserve the democratic political system and the american way of life.

Who did the first work in creating vaccines